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Doubly Heavy Tetraquarks in the Born-Oppenheimer approximation

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arxiv 2208.02730 v2 pith:WRK4MT2K submitted 2022-08-04 hep-ph

Luciano Maiani , Alessandro Pilloni , Antonio D. Polosa , Veronica Riquer This is my paper · ORCID
classification hep-ph
keywords tetraquarksapproximationborn-oppenheimerexpectedmassobservedapproximatelyaverage
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Tetraquarks QQq*q* are found to be described remarkably well with the Quantum Chromodynamics version of the Hydrogen bond, as treated with the Born-Oppenheimer approximation. We show the robustness of the method by computing the mass of the observed Tcc tetraquark following two different paths. Relying on this, we provide a prediction for the mass of the expected Tbb particle. The average sizes of tetraquarks are estimated to be approximately 3 - 5 GeV**-1. As a consequence hyperfine separations are not expected to be sizeable. We discussed possible reasons why LHCb has observed only one state in the DD* spectrum.

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Cited by 1 Pith paper

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  1. A short review on the compositeness of the $X(3872)$

    hep-ph 2025-02 conditional novelty 5.0 of 10

    Radiative decays and the LHCb line-shape data are incompatible with a purely molecular X(3872) and favor a compact or partially composite state, with a proposed molecular-amplitude fit for a decisive test.

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